"What is the name of the top brand of bulk liquor?"
If referring to a specific Chinese brand known for bulk liquor sales, there is no universally recognized "No.1" brand internationally. In China, brands like Red Star Erguotou (红星二锅头) or Niulanshan (牛栏山) are popular for bulk/budget-friendly liquor, but they are not exclusively sold as bulk liquor.
Note: "Bulk liquor" refers to alcohol sold in large quantities without branded packaging (e.g., from barrels or tanks). If you meant something else, feel free to clarify!